Core member of foam material for hair curlers



Jan. 6, 1959 c. L. OTTO ET AL 2,867,222

CORE MEMBER OF FOAM MATERIAL FOR HAIR CURLERS Filed June 1, 1955 Fig.1.

- glgENToR 'gzf w z ORN United States atent O v2,867,222 CORE MEMBER OF FOAM MATERIAL FOR HAIR CURLERS Carl Louis Otto, La Nelle Burnham Otto, and Joan Briton, ew York, N. assignors to Caronelle, Inc., New

York, N. Y., a corporation of New York Application June 1, 1955, Serial No. 512,519 Claims. (Cl. 132-39) The manner in which the above stated general object and other and more detailed objects hereinafter appearformingv a part hereof in which:

Fig. l. is. a fragmentary perspective view of a sheet or advantageously be made in accordance with the principles of the present invention; Fig." 2 is a more or ciples of the invention;

Fig, 3 is a top plan view of the apparatus shown in Fig. 2; and

Fig. 4 is a perspective view of one embodiment of a both natural and synthetic, all of which materials may be generically termed plastic foam.

The production of such materials in sheet form is ordi- 2,867,222 Patented Jan. 6, 1959 narily the least expensive, and in the art to which the present invention relates, the cost of production is a factor of major importance.

Assuming that the foam shafts 18 and 20, as seen in Fig. 2, being relatively very narrow as compared with the width of the blank 12, as seen from the roller 14 appearing in Fig. 3.

Rollers 14 and 16 are spaced so that, as the blank 12 is fed between them, the central portions of the opposed top and bottom faces 12a and blank are compressed toward each other to produce a a blank, into the positions indicated at A, B, C and D respectively in the finished core. The lateral plane surfaces and 12d, of which 120 appears in Fig. l,

posed confronting slots 22 and 24.

Numerous of the synthetic plastiematerials of the kind example, shown in Fig. 4, rollers through the Alternatively, electric resistance or inductive heat may, be employed for the adhesives, or other appropriate means.

For the purposes of the present invention, the strips Obviously, if the required physical specifications can be met, only one rather than two strips may be employed, and such strips may be paper-backed or otherwise treated to fulfill the requirements necessary toproduce such; as is indicated generally in Fig. 4.

In cases where one or more reinforcing stripssuchas a-stabilized'section with -a--compressed center 28-ai1d 3 are used, which are arrplas't-ie r'rl'a'teritilhallir'ig rid heat sealis 'ihdicat'ed by the arrows I I II I In some cases the forming rollers 14aiid "16 may in other cases "it 'r'nay operate asfeed tellers as well, and be found desirable to draw the forming rollers at 36 'ahd'3'8. I I II I I For completing-the formed material into core members for curlers fand thelikefall' that is required'is thatit be cut ihto'snit'abl'e lengths and provision for siich butting has been indicated-by the knife showhdia'grammatieally at 40 in Figs. 2 and 3. I I

As will-beseen from Fig.4, the core article produced is of generally eonvexl formedeyliridrical shape, provided with confronting grooves, the"latter' being advantageou'sly available asretaiiiin lotstor the finger'sor pron s f retaining *nie'bers,-whieh may' 'be 'ofth'e l iiid disclosed in the aforementioned U. 2 842140 I i 1 Also, thecereni'e iber,

by a separate-sever feed rollers indicated hers,

sealing to the foam materi al, "merits-er in its desired dress o'nal p Whilefiiiesifcifi exampleo rtic thereof has been "given by way of illustration, obvious that the invention can be earried oiit in various other specific embodiments without departing frtifri the scope 'of the invention which is to be understoodfas ,eriibracing all terms or product and manufacture "thereof falling withinthescope or the appended claims. What is clairried'is: a I a 1. As a new article offinaiiufacjture; a member comprising a body or elastic yres'ilieiit foaiii material or substantially uniform cross section along its length, said body having side portions each having a coiiiieXly-curved outer surface and said side portions being separated by confronting' slots, ar a means esntainiii' and reinforcing the foam material between said confrontin slots.

2. An article as defined-in claim 1 in which the'foam material con'sisfs or a synthetic resin.

'3. An article as eefined claim 2 'iiiiwhieh the foam material con'si's't's of apolye'sterbfthe' class consisting" of isocyanate and polyurethane. I I

4. As a new article of mairraet te a member 'com:

prising 'a body {of elastically resilient foamiirnaterial of substantially unit rm cross section along T its length, -said material through the 5. "Patent No. i

--body having -side-port-ions eac-h having-a eonvexl-y curved outer surface and said side portions being separated by confronting slots,

the foam material between said confronting slots comprising a strip of material stiffer than said foam material attached to the foam material at the bottom of at least one of said slots.-

5. An article as of stiffening material is a synthetic thermoplastic.

6. Ari article as defiii'ed'iri elaii'n 5 in which the strip of stiffening material is"se'cu.red to the ream-material by heat sealing. I

7. Anarticle as definedin claim- 4in which the strips of reinforcing material are fixed to the foam material at thebottorns of each 'of the confronting slots.

8. The method of forming a core member of foam material for hair curlers and the like which includes the steps of providing an "elongated blank of elastically islllentfain aterial er p lygsnal erds's setitiOh, passing the-blank befiw'eeii confronting rollers substantially =na'r= ri'wer thati-the-blank and spaced to-eompr ss between them the eenter t'ittieris er e' pesiteraees of the blank, whereby to I distort the blank to =-proauee a body having generally eonvexly curved lateral side faces, fixing the eemp'ressed roam material to "retain't'he distoltedshafie or the bl'anl and cutting the blank intodes'ired-lengths.

9'. The' r'riethbd off forminga core member of team rtiar im for 'hair curlers and the like "which ineludesthe steps-oi providing an elongatedblank 'o'f e'lastically re 'silient foam material of r'ectangular cross s'eotion, 'pas'sing the" blank between confronting rollers substantially nar= rower than the blank and spaced to compress between them theeenterpOrtion's' dro 'osite faces of the blank, whereby "to di'sttirt thesis-time "d geri'eially eylihdr'ieally biirved *1 hole 'a shay-having a rial'to""'etaiii the dis o I I 'eblank illtO desired lengths. g core 'hieriiber' for I II uses the ste of'pfovidi'rig all""el'fi t "(1 blank bf 'h t-seal'able 'elastic'ally I plastic foam material, passiiig'the'blafik'between eotiirsiitihg heated rollers narrower than the blaiik and spaced apart to compress the central portid'n'sof opposite faces "of the blank between the-roll rs; whereby to distort the blank to forth convexly 'curye d lateral side surfaees and to heat seal the foam material iii-its distorted fo'rm.

References Cited in the file of this patent UNITED STATES PATENTS 1,599,054 Lehr Septt 7 1926 2,061,356 Gosewi'sch --Nov. 1-7, 1936 2,414,177 Smith Jan.-14, -1947 -2,608",977 Trippler Sept: 2, 21952 2;630;809 Lewis et ea Mar. 10, 1953 FFE NCEIS Monsanto Technical, BulletinjNdf 1 -144, ""I socyanate o msdr -li w R si." 5; 2-1 9 3- g Mbds t i t i...P9 fi y;-'A illrl Modern Plastics, Polyurethane? November 1954.

and means containing and reinforcing which the strip 

